11112211221011 has 2 divisors, whose sum is σ = 11112211221012. Its totient is φ = 11112211221010.

The previous prime is 11112211220951. The next prime is 11112211221077. The reversal of 11112211221011 is 11012211221111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11112211221011 - 2¹⁰ = 11112211219987 is a prime.

It is not a weakly prime, because it can be changed into another prime (11112211223011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556105610505 + 5556105610506.

It is an arithmetic number, because the mean of its divisors is an integer number (5556105610506).

Almost surely, 2^{11112211221011} is an apocalyptic number.

11112211221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112211221011 is an equidigital number, since it uses as much as digits as its factorization.

11112211221011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11112211221011 its reverse (11012211221111), we get a palindrome (22124422442122).

The spelling of 11112211221011 in words is "eleven trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty-one thousand, eleven".